anti-citrullinated protein antibody (ACPA)

What is a Rheumatoid Arthritis? Rheumatoid arthritis (RA) is a chronic autoimmune disorder characterized by inflammation of the synovial joints, leading to pain, stiffness, and swelling. Unlike osteoarthritis, which primarily affects cartilage, rheumatoid arthritis targets the lining of the joints, known as the synovium, causing damage and eventually resulting in joint deformity and disability. Early…